Down arrow Cat-eLog Data Sheet
Scientific Name Physopyxis cristata  Sousa & Rapp Py-Daniel, 2005
Common Name
Type Locality Mouth of igarapé Zamula, rio Negro, Amazonas State, Brazil, 0°51'48"S, 62°46'44"W.
Down arrow Species Information
Size 23mm or 0.9" SL. Find near, nearer or same sized spp.
Identification Physopyxis can be distinguished from the other Doradidae by the miniature size (adults generally less than 31 mm SL) and a unique combination of additional features: extreme development of the exposed pectoral girdle; well developed coracoid process longer than the postcleithral process; anterior plate of the nuchal shield absent; dorsal spine serrated only along the basal portion of its anterior margin; two infraorbital bones in young that become fused into a single plate in adult specimens; pectoral spine reaching to base of anal fin.
Down arrow Habitat Information
Distribution South America: Rio Negro basin of the Amazon drainage in Brazil.
Amazon, Middle Amazon (Solimoes), Negro (click on these areas to find other species found there)

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2018.
Down arrow Husbandry Information
Breeding Unreported in the aquarium.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Neotropical Ichthyology v. 3 (no. 4), pp 632, Figs. 7, 8a.
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Last Update 2020 Oct 16 09:22 (species record created: 2011 Sep 24 09:31)